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HE 20.7102: C 73 |
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3.
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HE 20.7102: V 41 |
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HE 20.7131: 9639 |
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Pittsburgh, PA : U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Pittsburgh Research Center, 1997.
HE 20.7131: 9638 |
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7.
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Pittsburgh, PA : U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Pittsburgh Research Laboratory, 1997.
HE 20.7130:9447 |
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8.
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HE 20.7131: 9641 |
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HE 20.7114: T 79 |
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